def test_cyclical_graph_error():
g = nx.DiGraph()
g.add_node('a')
g.add_node('b')
g.add_edge('a', 'b')
g.add_edge('b', 'a')
with pytest.raises(ValueError):
compute_build_graph.order_build(g)
def test_order_build(testing_graph):
order = compute_build_graph.order_build(testing_graph)
assert order.index('b-on-linux') > order.index('a-on-linux')
assert order.index('c3itest-c-on-linux') > order.index('b-on-linux')
